We are seeking a highly experienced Senior Web Application Developer to serve as a technical leader, client liaison, and AI-enabled solutions engineer. This role requires a well-rounded full-stack background across modern web technologies, including but not limited to .NET/C#, JavaScript frameworks, cloud-native architectures, and emerging AI/ML integrations.
The ideal candidate brings 8+ years of experience building scalable web applications, combined with hands-on experience incorporating AI/ML capabilities (e.g., generative AI, APIs, or data-driven models) into production systems. This individual will act as a trusted advisor to clients, shaping technical direction while leading engineering teams to deliver innovative, secure, and high-performing solutions.
Primary Responsibilities
Full-Stack Architecture & Technical Leadership
Lead the architecture, design, and development of modern web applications across a diverse technology stack, including .NET/C#, Node.js, and front-end frameworks (React, Angular, Vue).
Design and implement scalable, cloud-native solutions using microservices and serverless architectures.
Establish and enforce engineering best practices, coding standards, and architectural patterns across teams.
AI/ML Integration & Intelligent Solutions
Design and implement AI-enabled application features, such as:
Integration with LLMs and AI APIs (e.g., Azure OpenAI, AWS Bedrock, or similar platforms)
Intelligent search, summarization, recommendation systems, or automation workflows
Collaborate with stakeholders to identify opportunities where AI can enhance user experience, decision-making, or operational efficiency.
Ensure responsible and secure use of AI technologies, including data privacy, governance, and model evaluation.
Client Engagement & Technical Strategy
Serve as a primary technical interface to clients, translating business needs into scalable technical solutions.
Lead solutioning sessions, architecture discussions, and technical briefings with stakeholders.
Provide strategic guidance on modern web technologies, cloud adoption, and AI integration.
Build strong client relationships as a trusted technical advisor.
Advanced Web Application & API Development
Oversee development of secure, high-performance web applications and RESTful APIs.
Ensure interoperability and cross-platform integration across systems.
Drive best practices in API design, versioning, and performance optimization.
Cloud & DevOps Enablement
Architect and deploy applications in AWS and Azure, leveraging serverless and containerized services.
Lead CI/CD pipeline implementation and DevSecOps practices.
Optimize systems for scalability, reliability, and cost efficiency in cloud environments.
Team Leadership & Mentorship
Mentor developers across multiple technology stacks, not limited to .NET.
Lead code reviews, architecture reviews, and technical decision-making.
Foster a culture of innovation, continuous learning, and engineering excellence.
Security, Performance & Quality
Ensure applications meet modern security standards, including secure API design and cloud security best practices.
Implement comprehensive testing strategies and performance monitoring.
Continuously improve system resilience, scalability, and maintainability.
UI/UX & Modern Web Practices
Collaborate with UI/UX teams to deliver responsive, accessible, and user-centric applications.
Drive adoption of modern front-end architecture and performance optimization techniques.
Innovation & Continuous Improvement
Stay current with emerging web and AI technologies, evaluating their applicability to client missions.
Introduce new tools, frameworks, and AI capabilities to improve delivery and innovation.
Basic Qualifications
Must be able to obtain a Public Trust prior to starting (US Citizenship Required).
Bachelor's or Master's degree in Computer Science, Information Technology, or related field (or equivalent experience).
8+ years of experience in full-stack web application development, including .NET/C# and modern JavaScript frameworks.
Demonstrated experience working across multiple web technologies beyond .NET (e.g., Node.js, Python, or similar).
Strong hands-on experience with T-SQL, including writing and optimizing SQL queries, stored procedures, triggers, functions, and other database objects.
Demonstrated commitment to built-in quality, including developing reliable, maintainable, and well-tested solutions that meet performance, security, and coding standards.
Ability to follow development best practices, conduct code reviews, troubleshoot issues, and ensure deliverables meet quality expectations throughout the development lifecycle.
Hands-on experience integrating or developing AI/ML capabilities, such as:
Working with AI APIs (Azure OpenAI, AWS Bedrock, etc.)
Implementing data-driven or intelligent application features
Strong experience with AWS and/or Azure cloud platforms, including serverless architectures.
Deep understanding of web architecture, microservices, and RESTful API design.
Experience with SQL and NoSQL databases.
Proven ability to lead teams and engage directly with clients.
Strong communication skills with the ability to bridge business needs and technical solutions.
Knowledge of secure application development and cloud security practices.
Preferred Qualifications
Certifications in AWS, Azure, or AI/ML-related technologies.
Experience building or integrating generative AI solutions in production environments.
Familiarity with Python for AI/ML workflows.
Experience with DevSecOps, CI/CD pipelines, and automation tools.
Prior experience in client-facing technical leadership roles within complex or mission-driven environments.
If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo - because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 - and moving faster than anyone else dares.
Original Posting: September 1, 2026
For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.
Pay Range: Pay Range $107,900.00 - $195,050.00
The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.
About Leidos
Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $16.7 billion for the fiscal year ended January 3, 2025. For more information, visit www.Leidos.com.
Pay and Benefits
Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available at www.leidos.com/careers/pay-benefits.
Securing Your Data
Beware of fake employment opportunities using Leidos' name. Leidos will never ask you to provide payment-related information during any part of the employment application process (i.e., ask you for money), nor will Leidos ever advance money as part of the hiring process (i.e., send you a check or money order before doing any work). Further, Leidos will only communicate with you through emails that are generated by the Leidos.com automated system - never from free commercial services (e.g., Gmail, Yahoo, Hotmail) or via WhatsApp, Telegram, etc. If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at LeidosCareersFraud@leidos.com.
If you believe you are the victim of a scam, contact your local law enforcement and report the incident to the U.S. Federal Trade Commission.
Commitment to Non-Discrimination
All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.
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About the role
This is a Senior Level role in the Technology field (Software engineering) at Leidos. Senior roles usually expect substantial experience, ownership of results and often the ability to guide others.
We could not match this job title to one occupation in the official wage statistics, so no pay estimate is shown. Pay is not in the source listing; ask the employer for the range and compare in the 240 job niches.
How to prepare and behave
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Read the whole description and match your examples to its requirements; use the same words the posting uses where they are true for you.
Research the employer before the interview: what it does, who its customers are and recent news; prepare two or three questions about the work.
Arrive early (or log in early for a video call), dress one step above the daily dress code, and test your camera and audio beforehand.
Answer with short stories: the situation, what you did and the result. Give numbers when you have them and never invent them.
Be honest about gaps; say what you did to learn and how fast you can close them.
Ask about the team, the first 90 days, how success is measured and the schedule; do not open with salary and time off.
When pay comes up, know the market range for the occupation and your lowest acceptable offer before you answer; ask for the full package in writing.
Send a short thank-you message within a day, mentioning one thing you discussed.
Have code, data work or projects you can show, and be ready to think aloud: many technical interviews test how you reason, not only the answer.
Indianapolis, IN is not one of the cities with its own page in our guides, so here is the state: Indiana.
The state economy in brief
Indiana is in the Midwest region (East North Central division) and has 6,851,073 residents (the 17th largest of the 50 states and DC by population), with a median age of 38.1. Its economy produced about $555,037 million in the latest four quarters (BEA), 19th among states and DC, equal to $81,015 per resident.
Jobs and the labour market
The unemployment rate was 3.4% in 2026M09, which is 14th lowest of 51 (1st is the lowest). Employers had job openings equal to 3.7% of employment, 33rd highest of 51, a measure of how hard it is to hire. The median wage across all occupations is $47,860 a year ($23.01 an hour), 6% below the national median ($47,860 against $50,980).
Prices are below the national average in Indiana: the regional price parity is 93.3 against 100 for the whole country (18th lowest of 51). Median gross rent is $1,062 a month and the median household income $71,957, so a year of rent equals 17.7% of income; the median home value is $218,200. The state minimum wage is $7.25 (the higher of state and federal rates applies to most workers). State income tax on wages: Flat 2.95%. It is a right-to-work state, meaning workers cannot be required to pay union dues as a condition of employment. It has no state paid family and medical leave programme in our source.
People and commuting
6.3% of residents were born abroad and 29.5% of adults hold a bachelor's degree or higher. Among workers, 76.3% drive alone, 0.6% use public transit and 10.7% work from home; 12.7% commute 45 minutes or more.
Places within 50 miles (straight line) of Indianapolis, IN that have a guide, with what living there costs. No pay estimate is shown because the title did not match one occupation.
Company description (from The Muse): Leidos is a Fortune 500® innovation company rapidly addressing the world’s most vexing challenges in national security and health.
size: Large Size; industries: Information Technology; locations on The Muse: Reston, VA.
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What is the Sr. Web Application Developer job at Leidos?
A senior level role in technology (software engineering) listed 2 days ago. The full description is on this page and on The Muse.
Where is this job?
Indianapolis, IN.
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How much does it pay?
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What is the cost of living there?
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How old is this listing?
It was posted on 2026-11-06 (2 days ago). Jobs older than 90 days are not shown.
Are there similar jobs?
Yes: browse software engineering jobs in Indiana.
Sources and terms
Job data: The Muse public API (listing dated 2026-11-06). The job disappears from this site when it disappears from the source.
Wages and projections: BLS OEWS (May 2025) and Employment Projections 2025–35.
City and county figures: Census Bureau ACS 2020–2024, BEA, BLS QCEW and LAUS, NASA POWER climatology; distances from Census Gazetteer coordinates.
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